This 128-page vocabulary practice book is part of a five-level series, and contains over 100 exercises. Each of the thirty units provides explanations and definitions of the target words, which have been selected specifically for B1 level and are grouped into themes such as People, Feelings, Education and Communication. The strength of the book is that it is based on the 4.5-billion-word Collins Corpus. The short introduction is informative, and includes some good study tips for students. There is helpful input on prefixes and suffixes, metaphorical language and collocations. The illustrations, often simple line-drawings, add variety. I would have liked the inclusion of word frequency data, which could be interesting for users. Although the book can be used in class, it is probably best for self-study.